Lens Driving Device, Camera Module and Optical Apparatus

• US 20160209672A1
• Filed: 01/19/2016
• Published: 07/21/2016
• Est. Priority Date: 01/16/2015
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Park, Tae Bong, Lee, Hee Se, Han, Jin Suk
• Granted Patent: US 10,520,699 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 27/646 compensating for small deviations, e.g. due to vibration or shake movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68
• CPC Class Codes: G02B 7/023 permitting adjustment
• CPC Class Codes: G02B 7/028 with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
• CPC Class Codes: G02B 7/04 with mechanism for focusing or varying magnification
• CPC Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism
• CPC Class Codes: G02B 7/09 adapted for automatic focusing or varying magnification
• CPC Class Codes: G02B 7/10 by relative axial movement of several lenses, e.g. of varifocal objective lens
• CPC Class Codes: G02B 7/102 controlled by a microcomputer cameras with interchangeable lenses G03B17/14
• CPC Class Codes: G02B 7/105 with movable lens means specially adapted for focusing at close distances
• CPC Class Codes: H05K 1/0281 Reinforcement details thereof
• CPC Class Codes: H05K 1/118 specially for flexible printed circuits, e.g. using folded portions
• CPC Class Codes: H05K 3/281 by means of a preformed insulating foil H05K3/284 takes precedence

Abstract

A lens driving device is provided, including: a holder member; a first driving unit disposed at the holder member; a base disposed at a lower side of the holder member and spaced apart from the holder member; a first circuit board disposed at an upper surface of the base; a second circuit board including a second driving unit facing the first driving unit, and disposed at an upper surface of the first circuit board; a support member supporting the holder member with respect to the base; and a guide portion protruded from an upper surface of the base, wherein the guide portion supports the second circuit board. In an embodiment, a coil at the second circuit board and a magnet at the holder member may be assembled at a predetermined interval, such that reliability of the product with respect to performance of handshake compensation device can be enhanced.

Claims

1. A lens driving device, comprising:

a holder member;

a first driving unit disposed at the holder member;

a base disposed at a lower side of the holder member and spaced apart from the holder member;

a first circuit board disposed at an upper surface of the base;

a second circuit board including a second driving unit facing the first driving unit, and disposed at an upper surface of the first circuit board;

a support member supporting the holder member with respect to the base; and

a guide portion protruded from an upper surface of the base,

wherein the guide portion supports the second circuit board.

2. The lens driving device of claim 1, wherein an upper surface of the guide portion contacts a lower surface of the second circuit board.

3. The lens driving device of claim 1, wherein

the base includes an opening penetrating through an inside of the base in a vertical direction, and

the guide portion includes a first guide portion contacting an inner circumferential surface forming the opening of the base and a second guide portion contacting an outer circumferential surface of the base.

4. The lens driving device of claim 3, wherein

the first guide portion includes a plurality of guide protrusions, and

the plurality of guide portions are arranged along the inner circumferential surface of the base by being spaced apart from each other.

5. The lens driving device of claim 4, wherein the first circuit board includes a first guide groove through which the first guide portion penetrates.

6. The lens driving device of claim 3, wherein the second guide portion is extended along an outer circumferential surface of the base.

7. The lens driving device of claim 6, wherein the first circuit board is not overlapped with the second guide portion in a vertical direction.

8. The lens driving device of claim 1, wherein

the first circuit board includes a first connecting portion, and

the second circuit board includes a second connecting portion arranged at a position corresponding to that of the first connecting portion and conductively connected with the first connecting portion.

9. The lens driving device of claim 8, wherein the support member is conductively connected with at least one of the first connecting portion and the second connecting portion.

10. The lens driving device of claim 8, wherein

the base includes a grooved portion formed by being recessed downward from an upper surface,

the first connecting portion and the second connecting portion are connected to each other by soldering, and

the first circuit board is fixed by being adhered to an epoxy disposed at the grooved portion.

11. The lens driving device of claim 1, further comprising:

a bobbin disposed at an inside of the holder member;

a third driving unit disposed at the bobbin, and facing the first driving unit;

an upper elastic member coupled to an upper portion of the holder member and an upper portion of the bobbin; and

a lower elastic member coupled to a lower portion of the holder member and a lower portion of the bobbin.

12. The lens driving device of claim 11, further comprising:

a sensing magnet disposed at a lateral surface of the bobbin;

a correction magnet disposed at another lateral surface of the bobbin, and establishing magnetic force equilibrium with the sensing magnet; and

a position detection sensor disposed at the holder member, and configured to detect the sensing magnet.

13. The lens driving device of claim 11, wherein

the first driving unit includes a magnet,

the second driving unit includes a fine pattern coil, and

the third driving unit includes a coil.

14. A camera module, comprising:

a holder member;

a first driving unit disposed at the holder member;

a base disposed at a lower side of the holder member by being spaced apart from the holder member;

a first circuit board disposed at an upper surface of the base;

a second circuit board including a second driving unit facing the first driving unit, and disposed at an upper surface of the first circuit board;

a support member supporting the holder member with respect to the base; and

a guide portion protruded from an upper surface of the base,

wherein the guide portion supports the second circuit board.

15. An optical apparatus, comprising:

a holder member;

a first driving unit disposed at the holder member;

a base disposed at a lower side of the holder member by being spaced apart from the holder member;

a first circuit board disposed at an upper surface of the base;

a second circuit board including a second driving unit facing the first driving unit, and disposed at an upper surface of the first circuit board;

a support member supporting the holder member with respect to the base; and

a guide portion protruded from an upper surface of the base,

wherein the guide portion supports the second circuit board.